GHD | Oceana Gold (New Zealand) Ltd | 12552081 | Waihi North 19 Table C.6 Minimum and maximum vertical hydraulic gradients – NRS Shallow Groundwater System Well Pair Date Water Level Difference (m) Vertical Distance (m) Vertical Gradient (up/down) WRS01 – WRS01a 4/12/2017 0.188 8.7 0.02 (down) 12/02/2018 1.993 0.2 (down) WRS02 – WRS02a 17/05/2018 0.041 8.5 0.005 (up) 20/03/2018 4.369 0.51 (down) WRS03 – WRS03a 29/05/2018 0.037 8.5 0.004 (down) 12/02/2018 0.751 0.09 (up) WRS04 – WRS04a 16/06/2017 0.212 11.5 0.02 (down) 19/02/2018 0.652 0.06 (down) WRS05 – WRS05a 8/09/2017 0.33 8 0.04 (down) 12/02/2018 1.04 0.1 (down) DH05 – WRS06 12/02/2018 0.29 5.7 0.05 (down) 20/03/2018 0.86 0.2 (down) WRS06 – DH05a 5/07/2017 0.05 6.5 0.01 (down) 30/06/2017 1.14 0.2 (down) WRS07 – DH09 20/03/2018 0.47 6.0 0.08 (up) 8/08/2017 0.56 0.09 (down) WRS08 – DH08 28/08/2018 2.16 9.0 0.2 (down) 12/02/2018 3.94 0.4 (down)
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